Communication System

1. An information terminal comprising: a non-volatile memory for storing a reference living body information; a display in which a sensor is incorporated, the display being configured to display an image and the sensor being configured to read a collation living body information of a user; a collation circuit part for collating the collation living body information with the reference living body information; and an A/D converter, a digital signal processor, and a comparison circuit in the collation circuit part, wherein the sensor is further configured to adjust luminance of the display, wherein the A/D converter is arranged to convert the collation living body information into digital signals, wherein the digital signal processor is arranged to receive the digital signals and convert the digital signals to numerical values, wherein the comparison circuit is arranged to compare and collate the collation living body information converted to the numerical values with the reference living body information, wherein the reference living body information is a fingerprint, a palm print or a voiceprint, and wherein the collation living body information is a fingerprint, a palm print or a voiceprint.

2. The information terminal according to claim 1 , further comprising an operation key and a control microcomputer, wherein the control microcomputer is arranged to control the sensor with an operation of the operation key.

3. The information terminal according to claim 1 , wherein the collation is performed by an image matching system or a feature collation system.

4. The information terminal according to claim 1 , further comprising: a signal processing circuit for compressing or expanding signals and encoding signals; and a transmission/reception circuit, wherein a notice of coincidence is outputted from the information terminal through the signal processing circuit and the transmission/reception circuit.

5. The information terminal according to claim 1 , wherein a notice of coincidence is transmitted through Internet.

6. The information terminal according to claim 1 , further comprising: a signal processing circuit for compressing or expanding signals and encoding the signals; a microphone; a speech input circuit; a speech output circuit; and a speaker.

7. The information terminal according to claim 1 , further comprising an antenna, wherein the antenna is configured to transmit a notice of coincidence as data to a mating party or a manager when a collation result proves coincident.

8. The information terminal according to claim 1 , wherein the reference living body information is a voiceprint, and wherein the collation living body information is a voiceprint.

9. The information terminal according to claim 1 , wherein the sensor is further configured to measure brightness around the information terminal.

10. The information terminal according to claim 1 , wherein the sensor is further configured so that the adjustment of the luminance is performed on the basis of brightness around the information terminal.

11. A cellular telephone comprising: a non-volatile memory for storing a reference living body information; a display in which a sensor is incorporated, the display being configured to display an image and the sensor being configured to read a collation living body information of a user; a collation circuit part for collating the collation living body information with the reference living body information; and an A/D converter, a digital signal processor, and a comparison circuit in the collation circuit part, wherein the sensor is further configured to adjust luminance of the display, wherein the A/D converter is arranged to convert the collation living body information into digital signals, wherein the digital signal processor is arranged to receive the digital signals and convert the digital signals to numerical values, wherein the comparison circuit is arranged to compare and collate the collation living body information converted to the numerical values with the reference living body information, wherein the reference living body information is a fingerprint, a palm print or a voiceprint, and wherein the collation living body information is a fingerprint, a palm print or a voiceprint.

12. The cellular telephone according to claim 11 , further comprising an operation key and a control microcomputer, wherein the control microcomputer is arranged to control the sensor with an operation of the operation key.

13. The cellular telephone according to claim 11 , wherein the collation is performed by an image matching system or a feature collation system.

14. The cellular telephone according to claim 11 , further comprising: a signal processing circuit for compressing or expanding signals and encoding signals; and a transmission/reception circuit, wherein a notice of coincidence is outputted from the cellular telephone through the signal processing circuit and the transmission/reception circuit.

15. The cellular telephone according to claim 11 , wherein a notice of coincidence is transmitted through Internet.

16. The cellular telephone according to claim 11 , further comprising: a signal processing circuit for compressing or expanding signals and encoding the signals; a microphone; a speech input circuit; a speech output circuit; and a speaker.

17. The cellular telephone according to claim 11 , further comprising an antenna, wherein the antenna is configured to transmit a notice of coincidence as data to a mating party or a manager when a collation result proves coincident.

18. The cellular telephone according to claim 11 , wherein the reference living body information is a voiceprint, and wherein the collation living body information is a voiceprint.

19. The cellular telephone according to claim 11 , wherein the sensor is further configured to measure brightness around the cellular telephone.

20. The cellular telephone according to claim 11 , wherein the sensor is further configured so that the adjustment of the luminance is performed on the basis of brightness around the cellular telephone.